APA (7th ed.) Citation

The new Encyclopaedia Britannica (15. ed., [14. print.].). Encyclopaedia Britannica.

Chicago Style (17th ed.) Citation

The New Encyclopaedia Britannica. 15. ed., [14. print.]. Chicago u.a: Encyclopaedia Britannica.

MLA (9th ed.) Citation

The New Encyclopaedia Britannica. 15. ed., [14. print.]. Encyclopaedia Britannica.